According to one embodiment of the invention, a cooling system (10) for a heat-generating structure (12) comprises a channel (23, 24), a surface enhancing structure, and a fluid dispenser. The channel has an inlet (25) and an exit (27). The inlet is operable to receive a fluid coolant into the channel substantially in the form of a liquid. The exit is operable to dispense of the fluid coolant out of the channel at least partially in the form of a vapor. The surface enhancing structure extends into the channel (23, 24) and is operable to receive thermal energy from the heat-generating structure (12) and transfer at least a portion of the thermal energy to the fluid coolant. The thermal energy from the heat-generating structure causes at least a portion of the fluid coolant substantially in the form of a liquid to boil and vaporize in the channel (23, 24) upon contact with the surface enhancing structure. The fluid dispenser is operable to deposit fluid coolant onto the surface enhancing structure.
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